Gate valve



- 1,550,338 A. BUTTNER Aug 18, 1925.

Filed Jan. 29. 1925 $11M. 2 All/ l,

My V// ///////////////////%9 2 M Patented Aug. 18, 1935.

UNITED STATES ARNO BoTTNER, or sunmvnuac, NEAR ,MAGDEBURG, GERMANY,

AssIeNoR 'ro THE PAT To FIRM POLIE, OF FLAGDEBURG, GERMANY.

GATE

VALVE.

Application filed January 29, 1925. Serial No. 5,583

To. (ZZZ whom it may concern Be it known that I, AnNo BoT'rNnR, a citizen of the German Republic, residing at Sudenburg, near Magdeburg, Germany, have invented certain new and useful Improvements in Gate Valves, of which the following is a specification.

My invention relates to an improved parallel slide stop valve or gate valve for use in steam conduits andcomprising two parallel cut-off plates.

According to the invention I provide at the lower end of the valve stem intermediate between the said two parallel plates, cooperating bodies of cylindrical cross-section which are firmly connected or integral with the actuating spindle or stem so as to project eccentrically therefrom and which, on the other hand, are located in parts of the plates so as to be enclosed therein from all sides and to act to withdraw the plates from the co-operating shutting faces or seals of the valve if the spindle or stem is turned in the opening or anticlockwise direction.

Obviously the movement of the plates in theclosing direction is less important than the opening movement thereof for when the valve is closed the pressure of the steam acting on the one side or plate ensures a light closure without the necessity of applying any supplemental mechanical means for the purpose. On the other hand, however, the withdrawal of the plates from their seats, in case of opening the valve, is of utmost importance particularly it the valve had remained in a closed state for a comparatively great length of time. For in such cases the cooperating sealing faces frequency stick together owing to the uninterrupted action of the heat so that it sometimes will be very diflicult to open the valve.

The object of my invention is to provide means for remedying this detect and to this end the shutting plates are withdrawn, according to my invention, with great power from their seats or cooperating faces owing to the eccentrical action o't the cylindrical bodies or enlargements I provide on the spindle or stem, so that the steam will be free to pass through the valve whereb the plates are relieved from steam pressure momentarily and the further opening of the valve can be brought about by a continued rotation of the spindle or stem in a comparatively easy manner.

I I am aware of the fact that in gate valves, particularly oi the larger type, means have been suggested heretofore for a similar purpose, providing a small tube in connection with the valve casing, said tube having a controlling valve and connecting the two spaces before and past the gate valve so that, by opening the small valve, a small amount of steam will be allowed to pass from the one sideto the other side of the gate valve in order to produce a pressure balance on both sides prior to the opening of the gate valve. In this way, the latter can be opened with greater ease since the shutting plates of the gate valve are not forced towards the seat through steam pressure acting on the one side which would occur if a pressure balance were not brought about previous to the opening of the gate valve. Instead of the complicated by-way in the form of a supplemental valve-controlled connecting tube, as heretofore, I provide, according to my invention, a more efiicient and simple means by which the shutting plates are positively withdrawn from their seats by eccentric cylindrical bodies or enlargements on the spindle or stem as soon as the latter is actuated to open the valve and vice versa.

In the drawings forming a part of the specification I have shown, by way of example, a preferred embodiment of the invention, it being understood that for simplicitys sake only the shutting plates, the part of the valve casing constituting the seats for the plates and the bottom end of the spindle or stem with the improved means for controlling the plates, as above indi cated, are illustrated. For the gate valve as a whole or respecting the other constituents thereof which are not d'epicted, may be of any suitable or conventional shape and con struction known to persons versed in the art so that it seems unnecessary to also illustrate and describe the same in detail, it being evident that the spindle or stem is adapted to rise and to descend if actuated in the usual manner by means of a handwheel commonly provided at the top of the spindle or stem, in the one or the other direction, in order to move the shutting plates.

In the drawings Figure 1 is a vertical section of the parts of the gate valve above mentioned; Figure 2 is ahorizontal section thereof taken on the line II-II of the Figare 1, the two figures showing the inovcan ilow thro gh the full or" the sectional parts in the withdrawn position, wl lst c ,v Q, area or the val\e way.

ure 3 is a central vertical section s g and illustrate osition oi' Figure 1 and Figure is a horizontal shutting plates 23 and (l l the short taken on the line 1Vlv of Figure 3 the out ot the spi the plates two figures showing the movable parts in 1 ontact ooperating the closing position. ing the v ")roperly Referring to the construction shown the in 1Y6. 13 and eated midwa between the t V 4 ion or in plates 3 and G and arries thre t. the )lates being in intimate bodies 2, J- and 5 ol eccentric? i tact Y c ant 8 oi" the casing or, in other words, is shaped to form thwe so that the valve is fully closed.

eccentrical enlargements of cylindrical C(Hl 'ihe shutti -L' s 3 and (3 are contour snugly fitting in .QiLlCZll bores J1 lateral projections or lugs oi the two shutt' plates the enlargements and 5 engw in the bottom projections or lngzs i0 and I of the plate 6 in order to control he lat and the intermediate enlargement 2 eng ing in the projection or lug 12 ot the pl: 3 in order control the same. It will.

I in a manner that they Jted as shown in Figures 2 with the seats or o of the c sing no nutter how ASAP e of re steam in the conhe, so that there never will be at ton between the plates 3 the reopen :ingr faces 7 and S of seen that the lug 12 is enclosed behvee'- the cas a and the closing faces of the plates the two lugs and ll and capable of sl l and of re seats w ll not be liable to be in o therebetween to a small amount depend worn to any considerable ing upon the eccentricity of the said enlarge ments on the spindle or stem 1, and turt e 1' that the enlar 'e ient or bodv :2 displace 180 with rela ir ctio. al contact which is the .ntage of in: improved gate valve er the state of the art.

urther advantape resides in the ion to the enlargements or sinibodies at and so that the ecce itrical accity (nd elliciency ot the described new tion or the movement of the two plates 3 rastra compared with the gate and 6 will talte place in opposite directions hitherto suggested and each time the spindle or stem is turned joints. be springs and applied which are enwith in nrv improved coir ier advantage lies in hating the eccentrical stein in case that rates or of the cas- ,.onal grinning" and event operating greater eccentricity o the spindle or stem to radially move the two plates I1 and 6 at had before been in troin the position shown in Figure l to re 3 with the nine it is believer that the .ovel features of my invenilv understood and. therem ile l description is deemed aces 7 and be readily ares. my invention to practice I in referred to herein as a trons in conditions will necesxnieurrence with the adopnes re to emphasize that on the eccentrical enlarge nindle hut also various minor t onstructions and l y be resorted ":hout sacrifico ion i, tatlon of its head-wheel, inove axially u red d wards without turning wherebjx the t o i the advantages of znv invention plates are removed from the conduit or the v i in the appended clanns. easing: portion 9 up to an elevated position v hat I claim 1s:

so that the valve will be open and the steam l. A device for operating a valve coma pair of shutting plates prising a casing;

in said casing each provided with a lateral lateralmovenient to said plates when said spindle is actuated. I

2. A device for operating a valve cone prising a casing a pair of shnttini-j plates in said casing, one of said plates having two lateral projections and the other having a single lateral projection adapted to project between the two lateral projections; and a spindle having three eccentrics thereon, two end eccentrics cooperating with the two lateral projections of one plate and a central eccentric cooperating with the single projection of the other plate in order to impart a lateral movement to said plates 20 when said spindle is actuated. I

In testnnony whereof I afliX my signatnre.

ARNO BOTTNER. 

